Optimization of sensitivity in Long Period Fiber Gratings with overlay deposition

Ignacio Del Villar; Ignacio R. Matías; Francisco J. Arregui; Philippe Lalanne

doi:10.1364/OPEX.13.000056

Optimization of sensitivity in Long Period Fiber Gratings with overlay deposition

Ignacio Del Villar^*
, Ignacio R. Matías
, Francisco J. Arregui
, Philippe Lalanne

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

377 Citations (Scopus)

Abstract

The deposition of an overlay of higher refractive index than the cladding in a Long Period Fiber Grating (LPFG) permits to improve the sensitivity to ambient refractive index changes in a great manner. When the overlay is thick enough, one of the cladding modes is guided by the overlay. This causes important shifts in the effective index values of the cladding modes, and henceforward fast shifts of the resonance wavelength of the attenuations bands in the transmission spectrum. This could be applied for improving the sensitivity of LPFG sensors. The problem is analysed with a numerical method based on LP mode approximation and coupled mode theory, which agrees with so far published experimental results.

Original language	English
Pages (from-to)	56-69
Number of pages	14
Journal	Optics Express
Volume	13
Issue number	1
DOIs	https://doi.org/10.1364/OPEX.13.000056
Publication status	Published - 2005
Externally published	Yes

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title = "Optimization of sensitivity in Long Period Fiber Gratings with overlay deposition",

abstract = "The deposition of an overlay of higher refractive index than the cladding in a Long Period Fiber Grating (LPFG) permits to improve the sensitivity to ambient refractive index changes in a great manner. When the overlay is thick enough, one of the cladding modes is guided by the overlay. This causes important shifts in the effective index values of the cladding modes, and henceforward fast shifts of the resonance wavelength of the attenuations bands in the transmission spectrum. This could be applied for improving the sensitivity of LPFG sensors. The problem is analysed with a numerical method based on LP mode approximation and coupled mode theory, which agrees with so far published experimental results.",

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T1 - Optimization of sensitivity in Long Period Fiber Gratings with overlay deposition

AU - Del Villar, Ignacio

AU - Matías, Ignacio R.

AU - Arregui, Francisco J.

AU - Lalanne, Philippe

PY - 2005

Y1 - 2005

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AB - The deposition of an overlay of higher refractive index than the cladding in a Long Period Fiber Grating (LPFG) permits to improve the sensitivity to ambient refractive index changes in a great manner. When the overlay is thick enough, one of the cladding modes is guided by the overlay. This causes important shifts in the effective index values of the cladding modes, and henceforward fast shifts of the resonance wavelength of the attenuations bands in the transmission spectrum. This could be applied for improving the sensitivity of LPFG sensors. The problem is analysed with a numerical method based on LP mode approximation and coupled mode theory, which agrees with so far published experimental results.

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JO - Optics Express

JF - Optics Express

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Optimization of sensitivity in Long Period Fiber Gratings with overlay deposition

Abstract

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